fetch before checkout #13

	name: Build documentation

	on:
	push:
	branches: ["master"]
	workflow_dispatch:

	# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
	# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
	concurrency:
	group: "pages"
	cancel-in-progress: false

	jobs:
	build-docs:
	runs-on: ubuntu-latest
	container: alpine:latest
	steps:
	- name: Install dependencies
	run: \|
	apk update
	apk add --no-cache git doxygen graphviz font-liberation python3 py3-pydot

	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: 'true'

	- name: Checkout correct version of style
	working-directory: docs/style
	run: \|
	git fetch
	git checkout v2.3.1

	- name: Generate docs
	run: \|
	mkdir -p build
	doxygen docs/Doxyfile

	- uses: actions/upload-artifact@master
	with:
	name: docs-web
	path: build/html

	deploy-pages:
	needs: build-docs

	environment:
	name: github-pages
	url: ${{ steps.deployment.outputs.page_url }}

	permissions:
	contents: read
	pages: write
	id-token: write

	runs-on: ubuntu-latest
	steps:
	- uses: actions/download-artifact@master
	with:
	name: docs-web
	path: html

	- name: Setup Pages
	uses: actions/configure-pages@v4

	- name: Upload artifact
	uses: actions/upload-pages-artifact@v3
	with:
	path: html

	- name: Deploy to GitHub Pages
	id: deployment
	uses: actions/deploy-pages@v4

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